He promised to help me and then_________.
| A．back out | B．backed out | C．backed of | D．backed on |
Tony ________ full marks, but he was so careless as to make a spelling mistake.
| A．could have gained | B．can have gained |
| C．must have gained | D．must gain |
Recently some Japanese have been trying to make conflicts with China, ________ effects we are greatly concerned.
| A．to whose | B．about whose | C．to which | D．about which |
Iraq has ________ too many wars since 1990, making his people ________ a lot.
| A．got through; pay | B．looked through; pain |
| C．gone through; suffer | D．passed through; damage |
________ the instructions very carefully when filling in the form.
| A．Following | B．To follow | C．Follow | D．Followed |
— Thanks for the lift. I do appreciate it.
— ________.
| A．No problem | B．With pleasure | C．Not necessary | D．A piece of cake |